The United States is one of the countries with the highest education quality in the world. It has a complete and unique education system, namely K 12 education system. Generally speaking, American education can be divided into four progressive stages: preschool education, primary education, secondary education (junior high school and senior high school) and higher education.

K- 12 is a general term for American basic education. "k" in "K 12" stands for kindergarten, and "K 12" stands for 12 grade (equivalent to the third grade in China). "K- 12" refers to the education from kindergarten to 12 grade, so it is also a general term for the basic education stage internationally.

Extended data:

K 12, an educational term, is the abbreviation of preschool education to senior high school education, and now it is widely used to refer to basic education.

K 12 is mainly adopted by the United States, Canada and other North American countries.

K 12 is the abbreviation of primary and secondary education in North America. This phrase is the abbreviation of kindergarten to 12 grade, and it is the first and last grade of free education in the United States and Canada.

Reference: Baidu Encyclopedia -K 12